I had a BOC Gases prototype CO2 snow blaster that I sold on Ebay a couple of
years ago. It was a high purity stainless steel gun with a special hose
that hooked directly to a special high purity CO2 cylinder with a dip tube.
The liquid CO2 turned into snow as it left the nozzle at high velocity. It
was designed for cleaning silicon wafers during chip fab. If you weren't
interested in the high purity, you could do pretty much the same with an air
blow gun and a high pressure hose to hook it to a CO2 cylinder. If you
turned the cylinder upside down you wouldn't need one with a dip tube.
Obviously the hose would need to be able to stand the full cylinder
pressure, even very cold, but it might be an interesting experiment. Wear
gloves and protect your eyes, particularly if the hose bursts!

--
Bob (Chief Pilot, White Knuckle Airways)


"Jerry Martes" wrote in message
news:fpf1e.18041$wL6.15138@trnddc03...
Bush Pete

How do you get the dry ice to size for blasting? I really like the
concept, but dont visualize how the process works.

Jerry



"Bushy Pete" wrote in message
...
Normal sandblasting will leave a messed up aluminium surface full of
tiny
dents that will catch food the next time they are used. I know from
years
ago in the army when we cleaned a bunch of hotplates with the workshop
sandblaster. They went back looking clean, but I pitty the next poor
buggers
that had to clean them.

They use crushed walnut shell blasting or similar for cleaning inside
some
aircraft engines, these would run just as happily through a normal $20
air
sander and be easy to do at home if you wished.

Top of the range is using dry ice as the grit for blasting out ovens and
cookwear on site and there is no residue other than the old carbon that
has
already been blown away. Totally food safe, and all you need is a
compressor, a sandblaster attachment and a container of dry ice
crystals.

Hope this helps,
Peter


"Dan" wrote in message
...
I have a couple of pizza shops (Way OT!) but metalworking DOES come
into
play!

We use aluminum pans for baking the pizzas in the oven and since we use
butter on the edges of the pan-pizza pans they start accumulating
carbon
buildup after a year or so of use. Is there a way for my to remove
this
carbon short of sandblasting? It must be a food safe and leave the
pans
structurally intact, figure about 125-150 pans overall that I need to
clean,
then re-season.

Any ideas? Anyone in the Kirkland or Kent WA area with a sandblaster
that
wants to trade sandblasting time for pizzas?

-Dan